Synopsis
With particular clarity this book covers virtually every possible classical cipher system. With 30 years experience as a professional cryptanalyst-- including WWII years when he was the key figure in the breaking of Japanese military codes--Frank W. Lewis is extremely well qualified to write what is perhaps the finest book ever written concerning the practical solution of classical cipher systems. Text includes problems for the student. For the historian, the text abounds with narrative memoirs and tales of cryptanalysis and personalities, plus twelve pages of pictures.
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